Moved into a bungalow in 2007. Lovely location; ugly, cold, poorly-extended, horrible house. Last December, after years of talking about it, we knocked it down. Right now the replacement house is being built, estimated to be finished at the end of August.
Woof, that's a pretty intense decision! A house nearby us wanted to put a 2nd floor on the home. When they investigated the footings, the found they were vastly insufficient (read: nonexistant) to support the weight of a 2nd story. When they opened up the walls shortly there after because of carpenter bees, they realized damn near the entire house's frame had been infested with carpenter bees and termites. The place was barely holding itself up...
So they tore the entire thing, foundation and all, down. They got the new foundation in place, and then COVID hit, and lumber prices went ABSOLUTELY INSANE. It's been 3 years since they took it down, and they still only have a foundation, and are living out of a (at this point very well insulated) garage.
I hope your project goes dramatically better than that.